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Calibrated February 5, 2026 · Certificate Included Calibration
This unit was calibrated on February 5, 2026 and ships with its calibration certificate, issued by Bionetics (PME cert, TPG). Bionetics is an established metrology and calibration provider serving commercial and government customers, operating fixed calibration laboratories and interfacing with NIST on the maintenance of primary standards.
Buyers should review the certificate and confirm that its scope, traceability, and calibration interval meet the requirements of their own quality program.
ConditionUsed. The exterior shows light scuffing consistent with normal bench and rack use — nothing major, no dents, cracks, or impact damage. See photos, which show the actual unit being sold.
OverviewThe HP 83731A is a microwave synthesized signal generator known for excellent spectral purity and high output power — typically greater than +14 dBm — with spectral purity maintained even at high power levels. It is widely used for microwave receiver testing, local oscillator substitution, and component characterization. It is the recommended local oscillator for the HP 8970B noise figure meter, where its low broadband noise reduces error when measuring low-gain devices, and it can drive 83550-series millimeter wave modules to generate signals up to 110 GHz.
Specifications Manufacturer Hewlett Packard / Agilent / Keysight Model 83731A Series HP 83700 series synthesized signal generators Frequency range 8 GHz to 20 GHz (as configured with Option 237) Output power Typically greater than +14 dBm Installed options 1E1 (step attenuator), 1E2, 1E5, 237 Serial number 3339A00110 Interface GPIB (HP-IB) Form factor Benchtop, rack mountable Cosmetic condition Light scuffing, no major wear or damage Calibration Bionetics PME certificate, February 5, 2026 — included Testing PerformedPowered on, passes self-test. Everything appears to be in perfect order, i have no cables to test everything./
What\'s Included
This unit is configured with Option 237 and covers 8 to 20 GHz. Standard 83731A units without this option cover 1 to 20 GHz. Please confirm the 8 GHz low-end limit suits your application before purchasing.
This model is obsolete and no longer sold or supported by Keysight. Support, parts, and future calibration availability should be confirmed independently.
Shipping & ReturnsShips promptly. The original packaging is not available, so the instrument is double-boxed with heavy foam padding on all sides and shipped insured to protect it in transit.
Returns are not accepted. Please review the photos and description carefully, and ask any questions before purchasing.

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